AECIAL STAGE OF ALSIKE CLOVER RUST 
471 
Conclusions from the above spore sowings : 
1. The aecial stage of 'alsike clover will not inoculate red 
clover, white clover, mammoth clover, crimson clover, alfalfa 
and white melilot. 
2. The aeciospores of alsike clover will inoculate alsike clover 
and produce the characteristic urediniospores. 
3. The urediniospores of alsike clover rust fail to inoculate 
the same plants that the aeciospores fail to inoculate. 
4. The urediniospores will inoculate alsike and produce the 
characteristic uredinia and telia. 
5. The teliospores germinate and produce the characteristic 
sporidia (which were observed in spore sowings on water) which 
produce the aecia on alsike clover only, following the aeciospores 
and urediniospores in this respect. 
6. The rust on alsike clover is a long cycled, autoecious rust 
with all spore forms w 7 hich have not been transferred to the 
other clovers. 
The Synonomy of Clover Rusts. 
Host, undetermined species of Trifolium. 
1. Puccinia trifolii (“Puceinia des trefles”), Hedw. f., 1805 
(PLe trefles rampant, le trefle filiforme et le trefle hybride”) 
(alsike). See Ref. 5, p. 5. 
2. Uredo fabae trifolii, Alb. and Sclrw., 1805. 
3. Uredo trifolii D. C., 1808. 
4. Aecidium trifolii-repentis Cast., 1842. 
5. Uredo fallens. Desm. (“in follis trifoliorum”), 1843, 
6. Aecidium trifolii (Hedw. f.) Liro, 1847. 
7. Trichobasis fallens, Cooke, 1870. 
8. Uromyces trifolii (Hedw. f.) Liro (4, p. 534). 
On- red clover T . pretense L. 
9. LTromyces trifolii (Hedw. 
f.) Liro, 1906. (The rust on 
Alsike clover is placed here by 
Sy dow. ) 
10. Uromyces fallens (Desm.) 
Nov. Comb. Kern, 1911. 
11. Nigredo fallens (Desm.) 
Arthur, 1912 
On white clover T. repens. L. 
Uromyces trifolii-repentis. 
(Cast) Liro, 1906. 6, p. 131- 
132. 
Uromyces trifolii (Hedw. f.) 
Liro, 1911, p, p. 6. 
Nigredo trifolii (Hedw. f.) 
(2, p. 219.) Arthur, 1912. 
Res. Sci. Con. Bot. Yien., 344. 
1906. 
(The rust on alsike clover is 
assigned to this species by 
Arthur. ) 
